description Wood Opal Overview
Wood opal is fossilized wood in which the original organic material has been replaced or impregnated by silica while retaining aspects of the wood's structure. The silica may form common opal, and in some specimens it can produce the color changes associated with precious opal. Visible grain, growth rings, pores, and cellular patterns distinguish it from ordinary opal. It is cut and polished for use as a decorative stone, cabochon, or geological specimen.
help Wood Opal FAQ
What is wood opal?
Wood opal is fossilized wood in which silica replaced or impregnated the original organic material. It can preserve details of the wood's structure while becoming mineralized.
Is wood opal made from real wood?
Yes, it begins as wood that was buried and later altered by silica-bearing fluids. The mineral material replaces or fills the wood while retaining features such as grain and growth structure.
Can wood opal show play-of-color?
Some specimens can show color changes associated with precious opal, but many are made of common opal and do not display strong play-of-color. The appearance depends on the silica and the specimen's internal structure.
How is wood opal different from ordinary petrified wood?
Wood opal is a type of silicified or fossilized wood in which opal is the main silica mineral. Other petrified wood may contain chalcedony or quartz instead, producing a different surface and optical appearance.
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